Find files using file-name ( case in-sensitve find)

# find -iname "MyCProgram.c"

Execute commands on files found by the find command

$ find -iname "MyCProgram.c" -exec md5sum {} \;

Find all empty files in home directory

# find ~ -empty

Search for a given string in a file (case in-sensitive search).

$ grep -i "the" demo_file

Print the matched line, along with the 3 lines after it.

$ grep -A 3 -i "example" demo_text

Search for a given string in all files recursively

$ grep -r "ramesh" *

I’ve carefully gone through your job posting on “SEO Expert”. I ’m an expert Search Engine Optimizer with more than 2 years experiences of both “On-Page” and “Off -Page” SEO. I am very much interested in your project with all of your requirements.

Recently I have successfully completed a SEO project on “A project name” both on-page and Off- page SEO, Full white hat Complying with Google Panda and Penguin Updates.

For more on my skill and successfully finished jobs, please have a look on my Profile, Portfolio, Work history and Feedback. You can see my official site also “nirutechnolabs” (If you have not any site, please delete this line)

I am always available on Email(nirutechnolabs@gmail.com) and Skype(nirutechnolabs). Please have a voice or video chat if necessary. I will be available more than 60 hours per week and able to start your project as soon as possible according to you.

I have got your job posting on “Job Title” and I am very much interested to work in your project. I am a pro blogger and content provider with more than 3 years working experiences of blog writing, Posting and SEO. So, I think you’ll find, I have the skills you’re looking for.

For more on my skill and successfully finished jobs, please have a look on my Profile, Portfolio, Work history and Feedbacks.Normally, I can write and post a blog content with graphics and all the SEO supplements within two hours.

I am always available on Email(nirutechnolabs@gmail.com) and Skype(nirutechnolabs). Please have a voice or video chat if necessary. I will be available more than 60 hours per week and able to start your project as soon as possible according to you.

I have got your job posting “Job Title” and I am very much interested to work in your project. I am a pro blogger and have more than 6 years experiences of blog writing, Posting and SEO. So, I think you’ll find, I have the skills you’re looking for.

For more on my skill and successfully finished jobs, please have a look on my Profile, Portfolio, Work history and Feedbacks. Normally, I can write and post a blog content with graphics and all the SEO supplements within two hours.

I am always available on Email(nirutechnolabs@gmail.com) and Skype(nirutechnolabs). Please have a voice or video chat if necessary. I will be available more than 60 hours per week and able to start your project as soon as possible according to you.

I’ve carefully gone through your job posting on “”. I ’m an expert Social Media Marketer with full internet marketing techniques. I have more than 6 years working experiences in SMM, IM, SEM, SEO, Affiliation, etc. I am very much interested in your project with all of your requirements.

Recently I have successfully completed many of SMM, IM, EM, etc.For more on my skill and successfully finished jobs, please have a look on my Profile, Portfolio, Work history and Feedbacks. You can see my official site also http://www.nirutechnolabs.com

I am always available on Email(nirutechnolabs@gmail.com) and Skype(nirutechnolabs). Please have a voice or video chat if necessary. I will be available more than 60 hours per week and able to start your project as soon as possible according to you.

I’ve carefully gone through your job posting on “Job Title”. I ’m an expert Youtube Channel Optimizer with more than 6 years experiences of both “On Channel” and “Off Channel” Optimization and SEO. I am very much interested in your project with all of your requirements.

Recently I have successfully completed two jobs on youtube channel optimization, http://www.youtube.com/user/nirutechnolabs; 

http://www.youtube.com/user/ravischauhan007

For more on my skill and successfully finished jobs, please have a look on my Profile, Portfolio, Work history and Feedbacks. You can see my official site also http://www.yoursitename.com

I am always available on Email(nirutechnolabs@gmail.com) and Skype(nirutechnolabs). Please have a voice or video chat if necessary. I will be available more than 60 hours per week and able to start your project as soon as possible according to you.

I am Your Name. I have completed my Diploma in Graphics Design and Text Illusion from Any University Name or Training Company Name. For the past few years I have designed many logos, banners, 3D textures, Auto Cad, Cartoons etc. Some samples have been posted in my portfolio area and my work history area. Please have a look to measure my quality.

From your job description area, I have come to know that you need a unique design for your new/existing company. Actually graphics is the soul of a website and permanent branding of a company. I can strongly assure you that I will be able to provide you according to your desire.

You will find so many so called designers in the web who even do not know the color combination and structure. I do not want you to be cheated by them. You are in a right place and person. Hopefully I will be hired in this project. I am highly experienced in

I am waiting for your response. I am able to use all types of communication methods and able to maintain your time schedule during the project is on.

I have got your job posting on Virtual Assistant Project. According to your job description you need a fast one for helping you in your tasks. And yes you have mentioned about your time. For your kind information I want to let you know that I have been working with these types of works for more than five years without any single time schedule problem.

I am fully expert in web research, extracting email, data mining, Google, Bing, Yahoo, MS Office (Full), Google Docs, Google Document, Google Spreadsheet, Adwords, Analytics, Webmaster, SEO, SMM, EM, SEM, PR, B2B Marketing, Lead Generation, Directory and other related programs.

I can assure you that I will be able to assist you in your task in time with quality work. I have already completed so many projects. Please have a look on my portfolio and profile. I have listed many successful projects in my work history area.

I have got your job posting on Data Entry Project. According to your job description you need a fast worker for your data mining and web research. For your kind information I want to let you know that I have been working with these types of works for more than five years.

I am fully expert in web research, extracting email, data mining, Google, Bing, Yahoo, MS Office (Full), Google Docs, Google Document, Google Spreadsheet, Adwords, Analytics, Webmaster, SEO, SMM, EM, SEM, PR, B2B Marketing, Lead Generation, Directory and other related programs.

I can assure you that I will be able to submit your task in time with quality work. I have already completed so many projects. Please have a look on my portfolio and profile. I have listed many successful projects in my work history area.

I have got your job posting for SMM. According to your job description, I have come to know that you are searching for an expert one. Now-a-days very few people can be found who do not use social media. Social media is the second need of the online people. If one organization can capture a large number of smm traffic, success can easily come to the owner. SEM and SEO are a gradual process which results slowly, rather SMM is an instant process which results faster.

Recently I have successfully completed so many SMM projects. For more information will you please visit my work history. Success is my main aim. I gain success by hock or by crook. And I have a strong belief that I will be able to satisfy you in this project. Hope I will be hired.

I am always available on Email and Skype. I will be available more than 60 hours per week and able to start your project as soon as possible according to you.

Ans: According to your job requirements, I have done many projects like yours. For more details you can check my portfolio, profiles and employment history where you will find the similar projects like your desire one.

2. Do you have suggestions to make this project run successfully?

Ans: Sure I have suggestions for you in this project. According to my concept, the updated strategy and proper methods can make this project successful. And surely I will make this project successful.

3. Which part of this project do you think will take the most time?

Ans: According to your job details, I have years of experiences in both fields. And I always use the updated techniques and win the competition. I have a strong belief that I would be able to make this project successful within short time.

4. Have you taken any oDesk/Upwork tests and done well on them that you think are relevant to this job?

Ans: Yes I have taken oDesk/Upwork Skill Tests and I have done well. You can check my tests area. Default system of odesk/Upwork tests is a good method of justify oneself. And yes I appreciate it as well as I did well in here.

5. How much time do you think it will take to accomplish the task for google results ?

Ans: Competition is everywhere. Always want to be ranked in google. But failing in this competition is problematic. And I know this problem. The problem is the so called workers do not use the updated methods where I always hit the iron when it is hot. That’s why I can assure you that I will be able to do it in short times than the rest (2+ or 3+ months)

6. What part of this project most appeals to you?

Ans: Here the two parts of this project appeal me very much, one is that all the requirements are in favor of me and the second one is I like to do these kind of job. These kind of project and job give me mental satisfaction.

7. Why do you think you are a good fit for this particular project?

Ans: I think I am a good fit for this job because I have all the qualities that you are looking for. Experience is the golden factor in this project where you find in me at least 3+ years of working experiences over all the factors in your project.

8. Do you have any questions about the job description?

Ans: Your arrangement of the job description is fully understandable and I have understood it very well. Still I have no questions about your job description. If I need any information latter, I must convey you and discuss with you in a friendly circumstances.

9. Which of the required job skills do you feel you are strongest at?

Ans: I have carefully read your job description and I have more than 3 years of working experience in both of your required skills. And I am strongest at all of your required qualities. Hope I will be the perfect worker for you in this project.

 10. What SEO jobs have you done in the past?

Ans: I have successfully completed many seo projects before, you can see my employment history and portfolio projects. I hope I will also be successful in this project. You can undoubtedly hire me.

11. How much time will you need to work on this project to see results and how will you spend your time working on this project?

Ans: I have a strong belief that I would be able to make this project successful within short time. I will spend my time working on this project hourly with white hat updated method and make it successful.

12. Have you done high quality back-linking before? if so what sites do you use?

Ans: Sure I have done high PR back-inkling before and ranked many sites. You can check my employment history and portfolio. (You can also include some links here)

13. Why should i chose you over the other 100 that have applied for this Job?

Ans:  This is a good point you have asked. Here you will found many so called worker who do not know how to work. I am totally different from them. I have a long term plan to work in here, that’s why I am here with all qualities and experiences. I am here not to cheat you rather help you.

14. What challenging part of this job are you most experienced in?

Ans: Everything is now becoming challenging, If one has to win he or she should have the proper knowledge of the present situation. And I am most experienced in this factor. Hope I will make your project successful.

15. Who have you worked with that has yielded quick results. What was the cost to client to receive positive results?

Ans: I have successfully completed many projects. You can see my portfolio and employment history. And I took the relevant cost, I never ask for high price.

16. Tell me how you would go about increasing my rankings for my website?

Ans: Ranking a website on some certain keywords are now very difficult. But if one has relevant ideas and skills about the search engines’ logarithm, he/she must win this competition. According to that I will first make your site search engine friendly then I will make it popular to others and increase its rank.

17. Why did you apply to this particular job?

Ans: I have applied to this particular job because all the requirements of this project are in favor of me and I can 100% assure you that I must be successful in this project and satisfy you. I never apply to any job what doesn’t match my skills.

18. Have you read the job description fully and understand it and feel you are an ideal candidate for the job?

Ans: Great question. I never take any attempt without having the full knowledge of a matter. I have carefully read the job description and only then I decided to apply when I thought; I am the best one for this project. You can undoubtedly hire me.

19. What questions do you have about the project?

Ans: I have read the whole job description and it is really informative. I did not found anything that is irrelevant to me. I have understood every single part of the job description. Still I have not any question about the project. If I need any further help, I must ask you.

20. Do you have previous experience? If so, do you have some examples?

Ans: This is a good question, my dear client. And yes, I have a lot of previous experiences. For more on it please check my profile, work history and feedback. I have also added some portfolio that is more relevant to your question. Thanks a lot.

21. What can you do for us that someone else can’t?

Ans: Yes, really a good question. You have seen many freelancers have applied in this project but the best one for this project should be the person who has previous experiences for the relevant skills. And I have both experiences and skills. That’s why I can proudly assure you that I will be the best one among the all workers.

22. Can you read and understand English to a reasonable standard?

Ans: Yes, I can read and understand English to a reasonable standard. Although English is my second language, I practiced it well and now I am able to fully read, write, listen and speak in English. Hope our conversation will go well during the project.

23. Why should I hire you?

Ans: Yes, really this is a good question. You have seen many freelancers have applied in this project but the best one for this project should be the person who has previous experiences for the relevant skills. And I have both experiences and skills. That’s why I can proudly assure you that I will be the best one among the all workers. Hope you have got your answers that why you should hire me?

Syntax

set key flags exptime bytes [noreply] 
value 

• key - It is the name of the unique key by which data is accessed.
• flags - It is the 32-bit unsigned integer that the server stores with the data provided by the user, and returns along with the data when the item is retrieved.
• exptime - It is the expiration time (seconds) of data stored in cache. A 0 value means "never expire", i.e. it should not be removed from the cache unless required. If the exptime is more than 30 days then Memcached interprets it as UNIX timestamp for expiration.
• bytes - This is the length of the data in bytes that needs to be stored in Memcached.
• noreply (optional) - This parameter informs the server not to send any reply.
• value - It is the data that needs to be stored. The data needs to be given on the new line after executing the command with the above options.

Example

key → tutorialspoint
flag → 0
exptime → 900 (expiry time in seconds)
bytes → 9 (size of data balue in bytes)
value → memcached

set tutorialspoint 0 900 9
memcached
STORED

get tutorialspoint
VALUE tutorialspoint 0 9
memcached

END

Output

STORED

• STORED indicates success.
• ERROR indicates incorrect syntax or error while saving data.

Set Data Using Java Application

Example

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
         // Connecting to Memcached server on localhost
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");
      
         // now set data into memcached server
         Future fo = mcc.set("tutorialspoint", 900, "Free Education");
      
         // print status of set method
         System.out.println("set status:" + fo.get());
         
         // retrieve and check the value from cache
         System.out.println("tutorialspoint value in cache - " + mcc.get("tutorialspoint"));

         // Shutdowns the memcached client
         mcc.shutdown();
         
      }catch(Exception ex){
         System.out.println( ex.getMessage() );
      }
   }
}

Output

Connection to server successful.
set status:true
tutorialspoint value in cache - Free Education

Syntax

add key flags exptime bytes [noreply]
value

• key - It is the name of the unique key by which data is accessed.
• flags - It is the 32-bit unsigned integer that the server stores with the data provided by the user, and returns along with the data when the item is retrieved.
• exptime - It is the expiration time (seconds) of data stored in cache. A 0 value means "never expire", i.e. it should not be removed from the cache unless required. If the exptime is more than 30 days then Memcached interprets it as UNIX timestamp for expiration.
• bytes - This is the length of the data in bytes that needs to be stored in Memcached.
• noreply (optional) - This parameter informs the server not to send any reply.
• value - It is the data that needs to be stored. The data needs to be given on the new line after executing the command with the above options.

Example

key → new_key
flag → 0
exptime → 900 (expiry time in seconds)
bytes → 10 (size of data balue in bytes)
value → data_value

add new_key 0 900 10
data_value
STORED
get new_key
VALUE new_key 0 10
data_value
END

Output

STORED

• STORED indicates success.
• NOT_STORED indicates the data is not stored in Memcached.

Failure Output

add new_key 0 900 5
redis
NOT_STORED

Add Data Using Java Application

Example

In last example, we have set key tutorialspoint. In this example, we shall try to demonstrate adding data having existing key.

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // Connecting to Memcached server on localhost
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // add data to memcached server
         Future fo = mcc.set("tutorialspoint", 900, "Free Education");

         // print status of set method
         System.out.println("set status:" + fo.get());

         // retrieve and check the value from cache
         System.out.println("tutorialspoint value in cache - " + mcc.get("tutorialspoint"));

         // try to add data with existing key
         Future fo = mcc.add("tutorialspoint", 900, "memcached");

         // print status of set method
         System.out.println("add status:" + fo.get());

         // adding a new key to memcached server
         fo = mcc.add("codingground", 900, "All Free Compilers");

         // print status of set method
         System.out.println("add status:" + fo.get());
         
         // retrieve and check the value from cache
         System.out.println("codingground value in cache - " + mcc.get("codingground"));

         // Shutdowns the memcached client
         mcc.shutdown();
         
      }catch(Exception ex){
         System.out.println(ex.getMessage());
      }
   }
}

Output

Connection to server successful.
set status:true
tutorialspoint value in cache - Free Education
add status:false
add status:true
codingground value in cache - All Free Compilers

Memcached - Replace Data

Syntax

replace key flags exptime bytes [noreply]
value

• key - It is the name of the unique key by which data is accessed.
• flags - It is the 32-bit unsigned integer that the server stores with the data provided by the user, and returns along with the data when the item is retrieved.
• exptime - It is the expiration time (seconds) of data stored in cache. A 0 value means "never expire", i.e. it should not be removed from the cache unless required. If the exptime is more than 30 days then Memcached interprets it as UNIX timestamp for expiration.
• bytes - This is the length of the data in bytes that needs to be stored in Memcached.
• noreply (optional) - This parameter informs the server not to send any reply.
• value - It is the data that needs to be stored. The data needs to be given on the new line after executing the command with the above options.

Example

key → mykey
flag → 0
exptime → 900
bytes → 10 (expiry time in seconds)
value → data_value (size of data balue in bytes)

add mykey 0 900 10
data_value
STORED
get mykey
VALUE mykey 0 10
data_value
END
replace mykey 0 900 16
some_other_value
get key
VALUE mykey 0 16
some_other_value
END

Output

STORED

• STORED indicates success.
• NOT_STORED indicates the data is not stored in Memcached.

Replace Data Using Java Application

Example

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try {
         //Connecting to Memcached server on localhost
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // First add a key and value
         Future fo = mcc.set("tutorialspoint", 900, "Free Education");

         // print status of add method
         System.out.println("add status:" + fo.get());

         // retrieve and check the value from cache
         System.out.println("tutorialspoint value in cache - " + mcc.get("tutorialspoint"));

         // adding a new key to memcached server
         fo = mcc.replace("tutorialspoint", 900, "Largest Tutorials' Library");

         // print status of set method
         System.out.println("replace status:" + fo.get());

         // retrieve and check the value from cache
         System.out.println("tutorialspoint value in cache - " + mcc.get("tutorialspoint"));

         // Shutdowns the memcached client
         mcc.shutdown();
         
      }catch(Exception ex){
         System.out.println( ex.getMessage() );
      }
   }
}

Output

Connection to server successful.
set status:true
tutorialspoint value in cache - Free Education
Replace status:true
tutorialspoint value in cache - Largest Tutorials' Library

Memcached - Append Data

Syntax

append key flags exptime bytes [noreply]
value

• key - It is the name of the unique key by which data is accessed.
• flags - It is the 32-bit unsigned integer that the server stores with the data provided by the user, and returns along with the data when the item is retrieved.
• exptime - It is the expiration time (seconds) of data stored in cache. A 0 value means "never expire", i.e. it should not be removed from the cache unless required. If the exptime is more than 30 days then Memcached interprets it as UNIX timestamp for expiration.
• bytes - This is the length of the data in bytes that needs to be stored in Memcached.
• noreply (optional) - This parameter informs the server not to send any reply.
• value - It is the data that needs to be stored. The data needs to be given on the new line after executing the command with the above options.

Example

• First we store a key (tutorials) and value (memcached) to Memcached
• Then, We retrieve the value using get command and check it
• Then, we append "redis" to the key tutorials
• and, we retrieve it and check again.

set tutorials 0 900 9
memcached
STORED
get tutorials
VALUE tutorials 0 14
memcached
END
append tutorials 0 900 5
redis
STORED
get tutorials
VALUE tutorials 0 14
memcachedredis
END

Output

STORED

• STORED indicates success.
• NOT_STORED indicates the key does not exist in the Memcached server.
• CLIENT_ERROR indicates error.

Append Data Using Java Application

Example

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // Connecting to Memcached server on localhost
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // add data to memcached server
         Future fo = mcc.set("tutorialspoint", 900, "Free Education");

         // print status of set method
         System.out.println("set status:" + fo.get());

         // retrieve and check the value from cache
         System.out.println("tutorialspoint value in cache - " + mcc.get("tutorialspoint"));

         // try to add data with existing key
         Future fo = mcc.append("tutorialspoint", 900, " for All");

         // print status of set method
         System.out.println("append status:" + fo.get());
         
         // retrieve and check the value from cache
         System.out.println("tutorialspoint value in cache - " + mcc.get("codingground"));

         // Shutdowns the memcached client
         mcc.shutdown();
         
      }catch(Exception ex)
         System.out.println(ex.getMessage());
   }
}

Output

Connection to server successful.
set status:true
tutorialspoint value in cache - Free Education
append status:true
tutorialspoint value in cache - Free Education for All

Memcached - Prepend Data

Syntax

prepend key flags exptime bytes [noreply]
value

• key - It is the name of the unique key by which data is accessed.
• flags - It is the 32-bit unsigned integer that the server stores with the data provided by the user, and returns along with the data when the item is retrieved.
• exptime - It is the expiration time (seconds) of data stored in cache. A 0 value means "never expire", i.e. it should not be removed from the cache unless required. If the exptime is more than 30 days then Memcached interprets it as UNIX timestamp for expiration.
• bytes - This is the length of the data in bytes that needs to be stored in Memcached.
• noreply (optional) - This parameter informs the server not to send any reply.
• value - It is the data that needs to be stored. The data needs to be given on the new line after executing the command with the above options.

Example

• First we set a key (tutorials) and value (memcached) in Memcached
• Then, We retrieve the value using get command and check it
• Then, we prepend "redis" to the key tutorials
• and, we retrieve it and check again.

set tutorials 0 900 9
memcached
STORED
get tutorials
VALUE tutorials 0 14
memcached
END
prepend tutorials 0 900 5
redis
STORED
get tutorials
VALUE tutorials 0 14
redismemcached
END

Output

STORED

• STORED indicates success.
• NOT_STORED indicates the key does not exist in the Memcached server.
• CLIENT_ERROR indicates error.

Prepend Data Using Java Application

Example

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // Connecting to Memcached server on localhost
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // add data to memcached server
         Future fo = mcc.set("tutorialspoint", 900, "Education for All");

         // print status of set method
         System.out.println("set status:" + fo.get());

         // retrieve and check the value from cache
         System.out.println("tutorialspoint value in cache - " + mcc.get("tutorialspoint"));

         // try to add data with existing key
         Future fo = mcc.prepend("tutorialspoint", 900, "Free ");

         // print status of set method
         System.out.println("prepend status:" + fo.get());
         
         // retrieve and check the value from cache
         System.out.println("tutorialspoint value in cache - " + mcc.get("codingground"));

         // Shutdowns the memcached client
         mcc.shutdown();
         
      }catch(Exception ex)
         System.out.println(ex.getMessage());
   }
}

Output

Connection to server successful.
set status:true
tutorialspoint value in cache - Education for All
prepend status:true
tutorialspoint value in cache - Free Education for All

Memcached - CAS Command

Syntax

cas key flags exptime bytes unique_cas_token [noreply]

• key - It is the name of the unique key by which data is accessed.
• flags - It is the 32-bit unsigned integer that the server stores with the data provided by the user, and returns along with the data when the item is retrieved.
• exptime - It is the expiration time (seconds) of data stored in cache. A 0 value means "never expire", i.e. it should not be removed from the cache unless required. If the exptime is more than 30 days then Memcached interprets it as UNIX timestamp for expiration.
• bytes - This is the length of the data in bytes that needs to be stored in Memcached.
• unique_cas_token − It is a unique token number obtained from gets comamand.
• noreply (optional) - This parameter informs the server not to send any reply.
• value - It is the data that needs to be stored. The data needs to be given on the new line after executing the command with the above options.

Example

• Incorrect cas statement i.e. unique cas key missing
• casing a non-existing key
• add a key value item
• obtain unique cas key using gets command
• use cas and unique_cas_key to update data item
• use get command and check if data is updated

cas tp 0 900 9
ERROR             <− unique cas key missing

cas tp 0 900 9 2
memcached
NOT_FOUND         <− the key tp does not exist

set tp 0 900 9
memcached
STORED

gets tp
VALUE tp 0 9 1
memcached
END

cas tp 0 900 5 1
redis
STORED

get tp
VALUE tp 0 5
redis
END

Output

• STORED indicates success.
• ERROR indicates error while saving data or wrong syntax.
• EXISTS indicates that someone has modified the CAS data since last fetch.
• NOT_FOUND indicates that the key does not exist in the Memcached server.

CAS Using Java Application

Example

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.CASValue;
import net.spy.memcached.CASResponse;
import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // Connecting to Memcached server on localhost
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // add data to memcached server
         Future fo = mcc.set("tutorialspoint", 900, "Free Education");

         // print status of set method
         System.out.println("set status:" + fo.get());
            
         // retrieve value stored for tutorialspoint from cache
         System.out.println("tutorialspoint value in cache - " + mcc.get("tutorialspoint"));

         // obtain CAS token value using gets method
         CASValue casValue = mcc.gets("tutorialspoint");

         // display CAS token value
         System.out.println("CAS token - " + casValue);

         // try to update data using memcached cas method
         CASResponse casresp = mcc.cas("tutorialspoint", casValue.getCas(), 900, "Largest Tutorials-Library");
         
         // display CAS Response
         System.out.println("CAS Response - " + casresp);

         // retrieve and check the value from cache
         System.out.println("tutorialspoint value in cache - " + mcc.get("tutorialspoint"));

         // Shutdowns the memcached client
         mcc.shutdown();
         
      }catch(Exception ex)
         System.out.println(ex.getMessage());
   }
}

Output

Connection to server successful.
set status:true
tutorialspoint value in cache - Free Education
CAS - {CasValue 34/Free Education}
CAS Response - OK
tutorialspoint value in cache - Largest Tutorials-Library